<?php

namespace Common\Controller;

class KyoPage 
{
    public $firstRow; // 起始行数
    public $listRows; // 列表每页显示行数
    public $parameter; // 分页跳转时要带的参数
    public $totalRows; // 总行数
    public $totalPages; // 分页总页面数
    public $rollPage   = 11;// 分页栏每页显示的页数
	public $lastSuffix = true; // 最后一页是否显示总页数

    private $target = ".kyo_data_list";
    private $p       = 'p'; //分页参数名
    private $url     = ''; //当前链接URL
    private $nowPage = 1;

	// 分页显示定制
    private $config  = array(
        'header' => '<li><a href="#">共 <span class="page_total">%TOTAL_ROW%</span> 条记录</a></li>',
        'prev'   => '上一页',
        'next'   => '下一页',
        'first'  => '1',
        'last'   => '%TOTAL_PAGE%',
        'theme'  => '%FIRST% %UP_PAGE% %LINK_PAGE% %DOWN_PAGE% %END% %HEADER%',
    );

    public function __construct($option) {
        /* 基础设置 */
        $this->set($option);
//         $this->parameter  = $option["param"] ? $option["param"] : $_GET;
        $this->nowPage    = empty($_GET[$this->p]) ? 1 : intval($_GET[$this->p]);
        $this->firstRow   = $this->listRows * ($this->nowPage - 1);
    }
    
    public function set($option) 
    {
        karray($option, array("total", "size", "roll", "tag", "url", "param", "config"));
        if ($option["total"])
            $this->totalRows = $option["total"];
        
        if ($option["size"])
        {
            $this->listRows = $option["size"];
            $this->firstRow   = $this->listRows * ($this->nowPage - 1);
        }
        
        if ($option["url"])
            $this->url = $option["url"];
        
        if ($option["roll"])
            $this->rollPage = $option["roll"];
        
        if ($option["tag"])
            $this->target = $option["tag"];
        
        if ($option["param"])
            $this->parameter = $option["param"];
        
        if ($option["config"])
            $this->config = $option["config"];
    }
    
    /**
     * 定制分页链接设置
     * @param string $name  设置名称
     * @param string $value 设置值
     */
    public function setConfig($name,$value) {
        if(isset($this->config[$name])) {
            $this->config[$name] = $value;
        }
    }

    /**
     * 生成链接URL
     * @param  integer $page 页码
     * @return string
     */
    private function url($page){
        return str_replace(urlencode('[PAGE]'), $page, $this->url);
    }

    /**
     * 组装分页链接
     * @return string
     */
    public function fetch() 
    {
        if (0 == $this->totalRows) 
            return '';
        
        if (!$this->url)
            $this->url = ACTION_NAME;

        /* 生成URL */
        if ($this->parameter)
            $this->url = U($this->url, $this->parameter.'&'.$this->p.'=[PAGE]');
        else
            $this->url = U($this->url, $this->p.'=[PAGE]');
        
        /* 计算分页信息 */
        $this->totalPages = ceil($this->totalRows / $this->listRows); //总页数
        if (!empty($this->totalPages) && $this->nowPage > $this->totalPages) 
            $this->nowPage = $this->totalPages;

        /* 计算分页零时变量 */
        $now_cool_page      = $this->rollPage / 2;
		$now_cool_page_ceil = ceil($now_cool_page);
		$this->lastSuffix && $this->config['last'] = $this->totalPages;

        //上一页
        $up_row  = $this->nowPage - 1;
        $up_page = $up_row > 0 ? '<li class="page_prev"><a href="#" url="'.$this->url($up_row).'" tag="'.$this->target.'">'.$this->config['prev'].'</a></li>' : '';

        //下一页
        $down_row  = $this->nowPage + 1;
        $down_page = ($down_row <= $this->totalPages) ? '<li class="page_next"><a href="#" url="'.$this->url($down_row).'" tag="'.$this->target.'">'.$this->config['next'].'</a></li>' : '';

        //第一页
        $the_first = '';
        if ($this->totalPages > $this->rollPage && ($this->nowPage - $now_cool_page) >= 1)
            $the_first = '<li class="page_first"><a href="#" url="'.$this->url(1).'" tag="'.$this->target.'">'.$this->config['first'].'</a></li>';

        //最后一页
        $the_end = '';
        if ($this->totalPages > $this->rollPage && ($this->nowPage + $now_cool_page) < $this->totalPages)
            $the_end = '<li class="page_end"><a href="#" url="'.$this->url($this->totalPages).'" tag="'.$this->target.'">'.$this->config['last'].'</a></li>';

        //数字连接
        $link_page = "";
        for ($i = 1; $i <= $this->rollPage; $i++)
        {
			if (($this->nowPage - $now_cool_page) <= 0 )
				$page = $i;
			elseif (($this->nowPage + $now_cool_page - 1) >= $this->totalPages)
				$page = $this->totalPages - $this->rollPage + $i;
			else
				$page = $this->nowPage - $now_cool_page_ceil + $i;
            
            if ($page > 0 && $page != $this->nowPage)
            {
                if($page <= $this->totalPages)
                    $link_page .= '<li class="page_num"><a href="#" url="'.$this->url($page).'" tag="'.$this->target.'">'.$page.'</a></li>';
                else
                    break;
            }
            else
            {
                if($page > 0 && $this->totalPages != 1)
                    $link_page .= '<li class="active"><a href="#">'.$page.'</a></li>';
            }
        }

        //替换分页内容
        $page_str = str_replace(
            array('%HEADER%', '%NOW_PAGE%', '%UP_PAGE%', '%DOWN_PAGE%', '%FIRST%', '%LINK_PAGE%', '%END%', '%TOTAL_ROW%', '%TOTAL_PAGE%'),
            array($this->config['header'], $this->nowPage, $up_page, $down_page, $the_first, $link_page, $the_end, $this->totalRows, $this->totalPages),
            $this->config['theme']);
        return "<ul class='pagination'>{$page_str}</ul>";
    }
}

?>
